I don't really care who is behind the sabotage, they would certainly not admit it for obvious reasons, and it could be more complex than it seems.
But the press, here in the UK, in France and in the US, has been suspiciously "clueless", avoiding with great care to imply that anyone in the west could be behind it, even if it really seems obvious that it could very well be the case.
Why? Why are they so careful? They usually are not afraid to speculate, especially on such a scale.
I find it disturbing to think that they could either have received instructions from their respective governments or are simply afraid push any inquiries on this subject.
USA has been pissed off by this project from the start.
This is also a way to send a strong message to Putin.
I am pretty sure that all secret services and governments around the world are perfectly aware of the situation.
Only the press is playing the hypocrisy game, for some reason.